Silo-mold.



e. B. BARRETT.

SILO MOLD.

APPLICATION FILED use. a. T915.

Patented 001;. 24, 1916.

4 SHEETS-SHEET I.

m: Ammzls versus cm. PHOTO-MING wnsmucmu. o c.

G. B. BARRETT.

SILO MOLD.

APPLICATION FILED DEILB. 1915.

Patented Oct. 24, 1916.

4 SHEETS-SHEET 2' G. B. BARRETT.

SILO MOLD.

APPLICATION man D50. 8. ms.

Patented Oct. 24; 1916.

4 SHEETS-SHEET 3.

flea/ya 5.562772 :ns courmzm-umm. WASHYNLIUN. n c

G. B. BARRETT.

SILO MOLD. APPLICATION FILED DEC-8,1915.

Patented Oct. 24, 1916.

4 SHEETS-SHEET 4.

GEORGE B. BARRETT, OF LENOBA, KANSAS.

SILO-MOLD.

reoae r.

To all whom it may concern:

Be it known that I, GEORGE E. BARRETT, a citizen of the United States, residing at Lenora, in the county of Norton and State of Kansas, have invented new and useful Improvements in Silo-Molds, of which the following is a specification.

This invention relates to molds and more particularly to silo molds.

One of the principal objects of the invention is to provide a mold of this character by which cement silos of varying sizes and thickness of walls may be conveniently and expeditiously constructed.

Another object of the invention is the provision of novel means for utilizing the reinforcing rods or bars as a support for the form and as a part of means for adj usting the form, whereby the silo may be constructed in superposed connected sections without necessitating the employment of a form extending the full height of the silo.

A further object of the invention is the provision of novel means for raising the material to the top of the form which means is so constructed that it may be raised from any given point and the material discharged at any given point into the form.

Further objects of this invention will appear as the following specific descript on is read in connection with the accompanying drawings which form a part of this application, and in which Figure 1 is a side elevation. Fig. 2 1s a top plan view. Fig. 3 is a vertical sectional view taken through the silo. Fig. 4. is a similar View showing the position of the parts with the inner wall spaced from the silo so as to be ready for elevation with the outer wall. Fig. 5 is a detail vertical sectional view taken on the line 55 of Fig. 3. Fig. 6 is a horizontal sectional view showing the manner of locking the inner and outer wall sections. Fig. 7 is a detail horizontal section showing the clamps for adjusting the height of the silo. Fig. 8 is an elevation showing the crane arm in elevated position. Fig. 9 is adetail perspective View of one of the bars, Fig. 10 is a similar view of one of the brace bars.

Fig. 11 is a detail view showing the locking levers and the cam faced abutments.

In constructing the device, I preferably form a suitable base 1 from which rise the vertical reinforcing bars 2 and 3, the former Specification of Letters Patent.

Patented Oct. at, late.

Application filed December 8, 19 15. Serial-No. 65,842.

of which are arranged in pairs and the latter of which are arranged intermediate the pairs. Any other suitable arrangement may be adopted providing there are certain of the bars arranged in pairs and the spaced intervals around the circumference of the silo. These reinforcing bars are all connect ed together by horizontal or circular reinforcing members 1 which hold the vertical bars in spaced relation and prevent cracking of the silo walls vertically.

The form utilized, consists essentially of inner and outer walls 5 and 6 which are constructed of arcuate sections 7 and 8 arranged to overlap each other at their ends, as shown. The inner sections are held against collapse and in the proper form by means of the locking levers 9 pivoted to one of the sections and engaged with cam faced a butments 10 on the adjoining sections. The outer wall sections are held in proper position by means of the locking levers 11 pivoted to the locks 12 on one of the sections and having an eccentric connection with one end of a pair of links 13 whose opposite ends are pivotally connected to bails 14- on the adjoining section. When the levers 11. are thrown to locking position, the links are beyond the pivotal center of the lever, thereby automatically locking the lever in closed position; When the lever is thrown to fully open position, it will, through the links 13 separate the sections 8 and thereby increase the diameter of the outer walls sufficiently to disengage the same from the silo wall and thus permit the mold form to be raised.

Arranged in the center of the mold is atubular shaft 15 having spiders 16 and 17 secured adjacent its upper and lower ends respectively. These spiders are connected to the sections of the inner wall 5 by bars 18 and 19, preferably made adjustable, as shown, so that the diameter of the inner wall, when increased in size by adding additional sections, may be properly supported. The spiders 16 and 17 are made removable so that additional bars 18 and 19 may be inserted, when it is desired to enlarged or reduce the diameter of the silo and it will be, of course, understood that the bars are pivotally connected to the spiders and to the sections of the inner wall.

Threaded into the upper end of the shaft 15 is a. jack screw 20 having secured thereon a collar 21 upon which is journaled a spider 22 having pivots connected to the arms end of an outer section.

.upper end of the crane frame. is provided with the usual operating crank members, as will be more readily hereinafter understood. The jack screw 1s 4 provided with an extension :24: which serves asa bearing, the purpose of which will be hereinafter described, and is squared upon its upper end to receive a lever or wrench for adjusting the same.

Each section has arranged adjacent one terminal end thereof, a transversely extending reinforcing bar 25 preferably of Liron. These bars are arranged in pairs, one of which is upon the end of an inner section and the other of which is upon the adjoining They extend vertically and are connected together at their upper ends by bolts 26 and held in spaced relation by sleeves 27 surrounding the bolts. F our of the bolts are preferably provided so as to form a bearing for an adjusting nut 28 in which is threaded an adjusting screw 29 having a lever upon its upper end. These screws have their lower ends engaged with adjustable abutments 3O clamped to two adjacent reinforcing bars 2. When the walls of the silo are adjusted to make a thick or thin wall, shorter or longer sleeves are used upon the bolts 26.

Secured upon'the upper bars 18 so as to be removable or adjustable in size, is a track 31 arranged concentric with the shaft 15 and adapted to support a crane frame 32 upon which is mounted a pivoted crane 33 having a pulley 3-1 on its outer end. The crane is pivoted tothe frame and carries a yoke member 35which straddles a central pin 36 and limits the downward movement of the outer end of the crane as will be readily understood. The crane frame, as shown, is connected adjustably with the extension 24 in such manner that the frame may travel around upon the track and the connection 37 rotate on the extension.

Mounted upon the frame 32 is a drum 38 upon which is wound a bucket hoisting cable 39 carrying a bucket 40 at its lower end. The cable travels over the pulley 35 on the crane arm and over the nut pulley 41 on the The drum and is held against retrograde movement by means of the ratchet and pawl 42.

. 'In the operation of the device, the sections of the inner and outer walls are connected together and mounted upon the base equally spaced from the reinforcing rods-or bars 2 and 3. Material is loaded into the bucket a0 and raised by operating the drum until the bar of the bucket contacts with the outer end of the crane. A continued operation of the drum in the proper direction will then cause the crane to pivot upon the frame and raise the bucket above the walls and throw the same inwardly so that it is positioned above the space between the walls ready to dump the contents thereof. lVhen the crane is in this position with the brace across the yoke carried with the center pin 36, it will be automatically held in this position, irrespective of the raising and lowering of the bucket and until thrown outwardly to a position beyond an angle 45 from the vertical and remain in such position. When thrown beyond the angle mentioned, the crane will drop to substantially horizontal position or until limited in its downward movement by the yoke when the bucket will hang suspended beyond and spaced from the outer wall of the mold and can be lowered to receive a fresh load of material. After the form has been completely filled up to the upper edge of the inner and outer walls, the lovers 9 and 11 will be released, thus causing the separation of the outer walls and permitting the contraction of the inner walls. Upon ope 'ating the jack screw, in the proper direction, the inner wall is contracted and thus both walls of the mold are separated from the wall of the silo. The screws 29 may then be operated to raise the mold to a second position, whereby a superposed tier may be filled in between the mold walls, it being, of course, understood that before the second tier is molded, the walls must be restored to normal position by operating the levers S) and 11 and turning the back screws in reverse directions. If the screws 29 are not sufficiently long to raise the mold walls a sufficient height for a second operation, one screw may be loosened and the clamps on its associated reinforcing rods elevated. When all of the clamps have been thus adjusted upon the reinforcing rods, the screws 29 may be again operated and the walls further raised.

The operation just described is, of course, repeated until the silo is completed and it will be understood, if it is not convenient to extend the reinforcing rods '2 the full height of the silo", that they may be made in seC- tions and connected together as the silo is built up.

It will be seen that by making the crane frame rotatable that material may be obtained from any suitable point and elevated and discharged around the entire circumference of the mold form.

In practice, each bar 18 is made of sections 18 adjustably secured together by bolts as shown in detail in Fig. 9. Each brace bar 23 is also made of sections 23 adjustably secured together by bolts as shown in Fig. 10. The'ends of the bolts which secure the abutments 30 are provided with handles to enable them to be manually turned as shown in Fig. 7.

What is claimed is 1. A mold form for silos comprising sectional inner and outer walls, means connected to the outer walls for contracting or expanding the same, means connected to the inner wall for expanding or contracting the same, a material hoisting mechanism and meanscarried upon a portion of the last named means for supporting the material hoisting mechanism.

2. In a mold form for silos, the combination of inner and outer form walls, bars rising from said wall, means for holding the bars in separated relation, a nut mounted on said bar holding means, a pair of abutments adapted to be clamped to and be vertically adjustable on a pair of upright reinforcing members of the concrete wall being built, and a screw threaded in said nut and bearing on said abutments and adapted to raise the mold walls.

3. A mold form for silos comprising secticnal inner and outer walls, levers connected to the adjoining sections of the outer walls and arranged for positively expanding and contracting said sections, levers connected to the sections of the inner walls for expanding the same, and means connected to the sections of the inner walls for simultaneously contracting all of said sections.

4. A mold form forsilos comprising sectional inner and outer walls, means for expanding and contracting the outer wall, levers connected to the sections of the inner wall for holding the same in expanded position, a central shaft, arms radiating from the shaft and connected with the sections of the inner wall, a member vertically movable with relation to the shaft and connections between the member and the sections of the inner wall whereby all of the sections of the inner wall may be simultaneously cont "acted.

5. Means for forming silo walls, braces connected to the inner wall, a track mounted upon the braces and a crane frame adapted to travel on the track.

6. Means for forming silo walls compris ing inner and outer walls, radial braces connected tothe inner walls, a track carried by certain of said braces, a central shaft connecting all of the braces, means coacting with the shaft and the braces for contracting the inner wall and a crane frame traveling upon the track and having connection with a member of said means.

7. Means for forming silo walls comprising a wall, a shaft arranged concentrically in said Wall, bracing means connecting said wall and shaft, a circular track supported on said bracing means and concentric with said shaft, a screw concentric and engaged with said shaft, adjusting and bracing means connected to the screw and first named bracing means, and a material hoisting mechanism mounted for circular movement on said track and having a member pivotally engaged with said screw.

In testimony whereof I afliX my signature inpresence of two witnesses.

GEORGE B. BARRETT.

Witnesses:

' E. E. JETER,

J. E. GOODSON.

@oplea of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. C. 

